test: auto-run verification round 2

feat: add auto-run workflow for turbo-all mode

test: auto-accept verification

test: verify auto-accept extension works

fix: use executeCascadeAction to set terminalAutoExecutionPolicy=EAGER(3)

fix: switch to settings-based approach - set chat.tools.terminal.enableAutoApprove directly

feat: Auto Run Command extension for Antigravity - auto-accept all agent steps and terminal commands